Gradient Tint 50/89% Light Transmission All visors for UK market are BS4110ZA or CE Certified (U.K. Road Legal). Visors manufactured by Bob Heath Visors Ltd are made from Abrasion Resistant Lexan(r) Polycarbonate for longer visor life and are available in thicknesses of 1mm; 1.5mm 2mm; and available in Clear; Smoke; Gradient tint. (model dependant).